Power electronic technology in wind generation system of variable speed-constant frequency

This paper summarizes the latest development of power electronic technology in wind generating system of variable speed-constant frequency (VSCF). Firstly, the typical structure, merits and demerits of general VSCF wind generating system are analyzed. The relative power electric technology and application in the direct-driven wind generating system and double-fed wind generating system, such as the full power converter, dual PWM converter, matrix converter, are introduced in detail. In addition, some new converters in VSCF wind generating system, such as rotor current controller, are also discoursed.